This page has only limited features, please log in for full access.
The transportation network design and frequency setting problem concerns the optimization of transportation systems comprising fleets of vehicles serving a set amount of passengers on a predetermined network (e.g., public transport systems). It has been a persistent focus of the transportation planning community while, its NP-hard nature continues to present obstacles in designing efficient, all-encompassing solutions. In this paper, we present a new approach based on an alternating-objective genetic algorithm that aims to find Pareto optimality between user and operator costs. Extensive computational experiments are performed on Mandl’s benchmark test and prove that the results generated by our algorithm are 5–6% improved in comparison to previously published results for Pareto optimality objectives both in regard to user and operator costs. At the same time, the methods presented are computationally inexpensive and easily run on office equipment, thus minimizing the need for expensive server infrastructure and costs. Additionally, we identify a wide variance in the way that similar computational results are reported and, propose a novel way of reporting benchmark results that facilitates comparisons between methods and enables a taxonomy of heuristic approaches to be created. Thus, this paper aims to provide an efficient, easily applicable method for finding Pareto optimality in transportation networks while highlighting specific limitations of existing research both in regards to the methods used and the way they are communicated.
Theocharis Vlachopanagiotis; Konstandinos Grizos; Georgios Georgiadis; Ioannis Politis. Public Transportation Network Design and Frequency Setting: Pareto Optimality through Alternating-Objective Genetic Algorithms. Future Transportation 2021, 1, 248 -267.
AMA StyleTheocharis Vlachopanagiotis, Konstandinos Grizos, Georgios Georgiadis, Ioannis Politis. Public Transportation Network Design and Frequency Setting: Pareto Optimality through Alternating-Objective Genetic Algorithms. Future Transportation. 2021; 1 (2):248-267.
Chicago/Turabian StyleTheocharis Vlachopanagiotis; Konstandinos Grizos; Georgios Georgiadis; Ioannis Politis. 2021. "Public Transportation Network Design and Frequency Setting: Pareto Optimality through Alternating-Objective Genetic Algorithms." Future Transportation 1, no. 2: 248-267.
In this paper, we investigate the performance of a bus lane that is (de)activated under specific road traffic and public transport conditions. More specific, the VISSIM microscopic simulation software along with VisVAP and EnViVer add-on modules were employed to represent the operation of a bus lane with intermittent use by cars in a highly congested arterial. We modelled various scenarios to determine the level of traffic volumes and bus service frequencies for which such bus lane concept would be effective. Empirical findings showed that when peak hour volumes range between 1000 and 2000 vehicles, the mixing of cars and buses on bus lanes may lead to a) serious reductions of vehicles’ queue lengths, b) significant decreases of greenhouse gas and air pollutant emissions derived from traffic flow and speed profile improvements and c) financial viability of the experiment. The joint use of bus lanes at 2000 vehicles per peak hour was highlighted as the most financially viable scenario. On the other hand, delays were comparatively increased due to the lower speed of cars which were moving onto the bus lane. Finally, our bus lane concept was not performed well under bus headways shorter than 2 min.
Aikaterini Kampouri; Ioannis Politis; Georgios Georgiadis. A system-optimum approach for bus lanes dynamically activated by road traffic. Research in Transportation Economics 2021, 101075 .
AMA StyleAikaterini Kampouri, Ioannis Politis, Georgios Georgiadis. A system-optimum approach for bus lanes dynamically activated by road traffic. Research in Transportation Economics. 2021; ():101075.
Chicago/Turabian StyleAikaterini Kampouri; Ioannis Politis; Georgios Georgiadis. 2021. "A system-optimum approach for bus lanes dynamically activated by road traffic." Research in Transportation Economics , no. : 101075.
Background COVID-19 pandemic is a challenge that the world had never encountered in the last 100 years. In order to mitigate its negative effects, governments worldwide took action by prohibiting at first certain activities and in some cases by a countrywide lockdown. Greece was among the countries that were struck by the pandemic. Governmental authorities took action in limiting the spread of the pandemic through a series of countermeasures, which built up to a countrywide lockdown that lasted 42 days. Methodology This research aims at identifying the effect of certain socioeconomic factors on the travel behaviour of Greek citizens and at investigating whether any social groups were comparatively less privileged or suffered more from the lockdown. To this end, a dynamic online questionnaire survey on mobility characteristics was designed and distributed to Greek citizens during the lockdown period, which resulted in 1,259 valid responses. Collected data were analysed through descriptive and inferential statistical tests, in order to identify mobility patterns and correlations with certain socioeconomic characteristics. Additionally, a Generalised Linear Model (GLM) was developed in order to examine the potential influence of socioeconomic characteristics to trip frequency before and during the lockdown period. Results Outcomes indicate a decisive decrease in trip frequencies due to the lockdown. Furthermore, the model’s results indicate significant correlations between gender, income and trip frequencies during the lockdown, something that is not evident in the pre-pandemic era.
Ioannis Politis; Georgios Georgiadis; Anastasia Nikolaidou; Aristomenis Kopsacheilis; Ioannis Fyrogenis; Alexandros Sdoukopoulos; Eleni Verani; Efthymis Papadopoulos. Mapping travel behavior changes during the COVID-19 lock-down: a socioeconomic analysis in Greece. European Transport Research Review 2021, 13, 1 -19.
AMA StyleIoannis Politis, Georgios Georgiadis, Anastasia Nikolaidou, Aristomenis Kopsacheilis, Ioannis Fyrogenis, Alexandros Sdoukopoulos, Eleni Verani, Efthymis Papadopoulos. Mapping travel behavior changes during the COVID-19 lock-down: a socioeconomic analysis in Greece. European Transport Research Review. 2021; 13 (1):1-19.
Chicago/Turabian StyleIoannis Politis; Georgios Georgiadis; Anastasia Nikolaidou; Aristomenis Kopsacheilis; Ioannis Fyrogenis; Alexandros Sdoukopoulos; Eleni Verani; Efthymis Papadopoulos. 2021. "Mapping travel behavior changes during the COVID-19 lock-down: a socioeconomic analysis in Greece." European Transport Research Review 13, no. 1: 1-19.
In this paper, we investigate the travel behavior changes in Thessaloniki, Greece aiming to understand them and explore the factors that affect them under the COVID-19 mobility restriction measures. Socioeconomic and mobility data from two questionnaire surveys, one year before and during the COVID-19 lockdown of April 2020 (with 1462 and 196 responses respectively), were compared by utilizing a wide variety of inductive statistical tests. Ordinary Least-Squares regression models and Cox proportional hazards duration models were employed to explore any concurrent socioeconomic effect on travel behavior patterns. Results showed that the number of daily trips per person was on average decreased by 50% during the lockdown. This decrease was much greater for the non-commuting trips. Trips on foot were increased, private car was mainly used for commuting and public transport modal shares were heavily reduced. Trip durations were generally increased, as travelling was considered a recreational activity per se. The starting times of the first trips of the day were more evenly distributed throughout the day and many travelers only started their first trips late in the afternoon. Older travelers generally maintained their mobility behavior patterns despite their higher vulnerability to COVID-19 disease. Lower-income travelers were likely to make more daily trips. Male travelers tended to make higher-duration trips compared to their female counterparts. Since pandemics may become recurring events in the future, our findings provide for a better understanding of their influence on mobility and support the design of customized policies to fulfill sustainable mobility objectives during lockdown circumstances.
Ioannis Politis; Georgios Georgiadis; Efthymis Papadopoulos; Ioannis Fyrogenis; Anastasia Nikolaidou; Aristomenis Kopsacheilis; Alexandros Sdoukopoulos; Eleni Verani. COVID-19 lockdown measures and travel behavior: The case of Thessaloniki, Greece. Transportation Research Interdisciplinary Perspectives 2021, 10, 100345 .
AMA StyleIoannis Politis, Georgios Georgiadis, Efthymis Papadopoulos, Ioannis Fyrogenis, Anastasia Nikolaidou, Aristomenis Kopsacheilis, Alexandros Sdoukopoulos, Eleni Verani. COVID-19 lockdown measures and travel behavior: The case of Thessaloniki, Greece. Transportation Research Interdisciplinary Perspectives. 2021; 10 ():100345.
Chicago/Turabian StyleIoannis Politis; Georgios Georgiadis; Efthymis Papadopoulos; Ioannis Fyrogenis; Anastasia Nikolaidou; Aristomenis Kopsacheilis; Alexandros Sdoukopoulos; Eleni Verani. 2021. "COVID-19 lockdown measures and travel behavior: The case of Thessaloniki, Greece." Transportation Research Interdisciplinary Perspectives 10, no. : 100345.
Currently, there has been a research focus on exploiting the information that can be extracted from social media platforms for scientific purposes. Social media data is dynamic, user-generated, and includes a combination of spatial, temporal, and textual information. Mining and analyzing transport information from social media is a relatively new field and it can be used during transportation planning and management, as well as for supporting the achievement of specific transport policy goals. In addition, social media provide public transport agencies with an unparalleled opportunity to connect with their customers. This paper explores the use of social media among public transport agencies in Europe. In this context, a relevant literature review was combined with original findings obtained from a survey on selected public transport agencies. Relevant information was derived from online sources, including blog posts, websites, online journals and publications. The survey results provided an integrated overview of the use of social media among the selected agencies. Public transport operators use social media mainly for: (a) real-time updates and information, (b) information to customers regarding services, fares, and services disruptions, (c) engaging citizens by handling complaints and inquiries, (d) employee recognition and recruitment of staff and (e) video entertainment and contests. Twitter was most commonly used for short communications and service updates, Facebook for short announcements and service updates, but also for community building and branding. Organizations employ YouTube and Instagram to build community support, whereas LinkedIn was used for networking and recruitment.
Georgios Georgiadis; Anastasia Nikolaidou; Ioannis Politis; Panagiotis Papaioannou. How Public Transport Could Benefit from Social Media? Evidence from European Agencies. Advances in Intelligent Systems and Computing 2020, 645 -653.
AMA StyleGeorgios Georgiadis, Anastasia Nikolaidou, Ioannis Politis, Panagiotis Papaioannou. How Public Transport Could Benefit from Social Media? Evidence from European Agencies. Advances in Intelligent Systems and Computing. 2020; ():645-653.
Chicago/Turabian StyleGeorgios Georgiadis; Anastasia Nikolaidou; Ioannis Politis; Panagiotis Papaioannou. 2020. "How Public Transport Could Benefit from Social Media? Evidence from European Agencies." Advances in Intelligent Systems and Computing , no. : 645-653.
The bloom of computer engineering and data science unveils new potential for several business sectors, regarding the enhancement of their operational functions. Transport stakeholders can benefit from computer science advances, such as Artificial Intelligence (ΑΙ) or Data Mining (DM) techniques, which can contribute to the utilization of existing data and maximize their productive efficiency. Reduced operating costs, decreased travel times, as well as faster freight delivery times are among several gains that can be achieved through the adoption of such techniques. Analysing transport related social media content could also provide useful insight into customers’ needs and preferences based on their social media behaviour. However, the aforementioned computer science fields are relatively new and require advanced hardware as well as necessary expertise. Thus, the take – up from transport operators is not significant yet. In this paper, we provide an overview of the currently applied AI and DM techniques in corporate decision making, planning, and management practiced by various transport operators worldwide. Our literature review highlights original findings and case studies from selected freight and passenger transport operators in Greece. To further investigate their activities, a questionnaire survey was conducted to examine the existence of a systematic data collection system, the processes of data mining and analysis applied (if any) and most importantly the fields where the information derived from data analysis is exploited. Survey findings reveal the relative maturity of Greek transport operators for applying AI and DM techniques.
Aristomenis Kopsacheilis; Anastasia Nikolaidou; Georgios Georgiadis; Ioannis Politis; Panagiotis Papaioannou. Investigating the Prospect of Adopting Artificial Intelligence Techniques from Transport Operators in Greece. Advances in Intelligent Systems and Computing 2020, 1097 -1106.
AMA StyleAristomenis Kopsacheilis, Anastasia Nikolaidou, Georgios Georgiadis, Ioannis Politis, Panagiotis Papaioannou. Investigating the Prospect of Adopting Artificial Intelligence Techniques from Transport Operators in Greece. Advances in Intelligent Systems and Computing. 2020; ():1097-1106.
Chicago/Turabian StyleAristomenis Kopsacheilis; Anastasia Nikolaidou; Georgios Georgiadis; Ioannis Politis; Panagiotis Papaioannou. 2020. "Investigating the Prospect of Adopting Artificial Intelligence Techniques from Transport Operators in Greece." Advances in Intelligent Systems and Computing , no. : 1097-1106.
The eve of the 2020s finds European cities in a process of shifting citizens’ mobility preferences towards more sustainable transport means. Cycling is an emerging alternative to motorised modes, particularly due to its lower operating cost and its contribution to healthier lifestyles and containment of climate deregulation from transport sector. Towards establishing cycling as a commuting mode and decreasing private car use, city authorities are increasingly investing in delivering integrated cycling route networks, pro-cycling policies and related services. However, poor and inadequate network design may act as a deterrent to cycling, due to safety, accessibility or quality concerns. To address this, the Greek Ministry of Transport in 2016 issued a set of technical guidelines for cycling network infrastructures in order to standardize their design process. In response to these new guidelines, this paper proposes a methodology for the assessment of existing cycling infrastructure through the utilization of a structured checklist. This checklist considers critical components of bicycle networks, such as their signage, width, inclinations, lighting, intersections, types of separation and interface with other modes and examines them against the minimum requirements described in national standards. The methodology was piloted in the existing cycling networks of Athens and Trikala, Greece. Results indicated certain design flaws and the attributes that did not comply with national standards. The proposed methodology could assist planning authorities into monitoring the quality of cycling infrastructure in Greek cities and indicating the aspects that do not meet the national set thresholds along with highlighting the appropriate interventions.
Georgios Georgiadis; Efthimios Bakogiannis; Aristomenis Kopsacheilis; Georgios Barmpas; Ioannis Politis. Assessing the Compliance of Existing Cycling Route Infrastructure Against National Guidelines in Greece. Advances in Intelligent Systems and Computing 2020, 980 -990.
AMA StyleGeorgios Georgiadis, Efthimios Bakogiannis, Aristomenis Kopsacheilis, Georgios Barmpas, Ioannis Politis. Assessing the Compliance of Existing Cycling Route Infrastructure Against National Guidelines in Greece. Advances in Intelligent Systems and Computing. 2020; ():980-990.
Chicago/Turabian StyleGeorgios Georgiadis; Efthimios Bakogiannis; Aristomenis Kopsacheilis; Georgios Barmpas; Ioannis Politis. 2020. "Assessing the Compliance of Existing Cycling Route Infrastructure Against National Guidelines in Greece." Advances in Intelligent Systems and Computing , no. : 980-990.
Sustainable development requirements in combination with extreme technological evolution have changed the way mobility is considered, creating challenges to Local Authorities (LΑs) both in planning and implementation phases of mobility solutions. This paper focuses on the capacity building of LAs to deliver Mobility-as-a-Service (MaaS) and other innovative transport schemes as part of Sustainable Urban Mobility Plans (SUMPs). It presents a methodological approach for the design and employment of an integrated learning tool that intends to increase the adoption rates of measures’ packages through LAs knowledge strengthening. The learning tool consists of a detailed facilitator guide to run an one-day classroom course along with the conceptual background and necessary training material. The methodological approach consists of a multilevel and multicriteria process that integrates the results/outcomes of the assessment of the cities capacity to implement SUMP through an evaluation framework. The classroom course has been structured in order to clarify the value of MaaS and other innovative measures for small-medium cities, analyze successful case studies under the spectrum of overcoming challenges efficiently, present tools and guidelines supporting collaboration between team members. The results of this work have been validated through the pilot application to six LAs. The overall evaluation of the pilots showed that content’s accuracy and achievement of workshop’s objectives was more than satisfactory (more than 50% of the participants gave the highest rate) and participants became more engaged with SUMP measures implementation.
Anastasia Founta; Olympia Papadopoulou; Sofia Kalakou; Georgios Georgiadis. Building Capacity of Small-Medium Cities’ Local Authorities to Implement MaaS and Other Innovative Transport Schemes. Advances in Intelligent Systems and Computing 2020, 357 -367.
AMA StyleAnastasia Founta, Olympia Papadopoulou, Sofia Kalakou, Georgios Georgiadis. Building Capacity of Small-Medium Cities’ Local Authorities to Implement MaaS and Other Innovative Transport Schemes. Advances in Intelligent Systems and Computing. 2020; ():357-367.
Chicago/Turabian StyleAnastasia Founta; Olympia Papadopoulou; Sofia Kalakou; Georgios Georgiadis. 2020. "Building Capacity of Small-Medium Cities’ Local Authorities to Implement MaaS and Other Innovative Transport Schemes." Advances in Intelligent Systems and Computing , no. : 357-367.
Sustainable urban mobility is now a well-established concept in European cities which, during the last decade, they continuously put significant effort into elaborating sustainable urban mobility plans and upgrading their systems in favor of environmentally friendly transport modes. Walking is being gradually established as a primary pillar of urban mobility by being promoted as an attractive transport solution for both door-to-door and last mile trips. In order to increase walking modal shares, cities should provide a high-quality pedestrian mobility environment both in terms of related services and infrastructures. This study presents several results from a structured walkability audit process for evaluating pedestrian mobility conditions in urban areas. The study examines the case of small cities in Greece which so far have been characterized by a more car-oriented transport development and experience comparatively higher difficulties into securing appropriate funding for sustainable transport investments. In this study’s context, the proposed walkability audit has been performed in three (3) small Greek cities which represent different urban development models, i.e. a city with a physical barrier (Trikala), a historical small city with particular town layout (Mesologgi) and a city with high inclinations (Kavala). For each city case, key pedestrian quality and quantity indicators, such as sidewalks operating width per reference network length, quality of sidewalk pavement and pedestrians’ perceived safety and security, are measured and discussed. Comparative analysis of these indicators demonstrates critical strengths and weaknesses in each city and assists into prioritizing appropriate pedestrian mοbility improvement actions.
Georgios Barmpas; Georgios Georgiadis; Anastasia Nikolaidou; Rafail Katkadigkas; Dimitrios Tsakiris. Evaluating Pedestrian Environments: Evidence from Small Cities in Greece. Advances in Intelligent Systems and Computing 2020, 595 -605.
AMA StyleGeorgios Barmpas, Georgios Georgiadis, Anastasia Nikolaidou, Rafail Katkadigkas, Dimitrios Tsakiris. Evaluating Pedestrian Environments: Evidence from Small Cities in Greece. Advances in Intelligent Systems and Computing. 2020; ():595-605.
Chicago/Turabian StyleGeorgios Barmpas; Georgios Georgiadis; Anastasia Nikolaidou; Rafail Katkadigkas; Dimitrios Tsakiris. 2020. "Evaluating Pedestrian Environments: Evidence from Small Cities in Greece." Advances in Intelligent Systems and Computing , no. : 595-605.
The operation of minibuses as public transport modes worldwide is considered as a both efficient and effective way to meet the mobility needs of special population groups in urban areas. Minibus services are more flexible in terms of routing and scheduling as well as more affordable compared to regular bus public transport. This paper investigates the potential introduction and the characteristics of a minibus transit service in the Municipality of Kalamaria (~90,000 pop.) in Thessaloniki Greater Area, Greece. The research is based on a joint revealed and stated preference survey, which took place in 2015 and was addressed to the citizens of the Municipality, where such a minibus service was formerly active. The revealed preference survey mainly explored the current travel behavior of citizens and their level of acceptance for such a service in case of its reopening. The stated preference survey investigated the intentions and travel preferences of the respondents under different scenarios of travel time, service frequency and travel cost. A total of 140 questionnaires was collected and analyzed using descriptive and inferential statistics. Causal analysis was conducted to reveal interrelations of respondents’ willingness to use the service depending on the above attributes. According to the research findings, the perceived “quality of service” is strongly associated with safety, reliability and comfort of the transport mode used. Additionally, travel time is considered more important than cost. Although respondents seem to prefer a free of charge service, it was found that Willingness-to-Pay for minibus services ranges around 0.5 euros.
Maria Akrioti; Socrates Basbas; Georgios Georgiadis; Eftihia Nathanail. Investigation of Minibus Public Transport Service Characteristics in an Urban Area Through the Use of a Stated and Revealed Preference Survey. Advances in Intelligent Systems and Computing 2020, 11 -20.
AMA StyleMaria Akrioti, Socrates Basbas, Georgios Georgiadis, Eftihia Nathanail. Investigation of Minibus Public Transport Service Characteristics in an Urban Area Through the Use of a Stated and Revealed Preference Survey. Advances in Intelligent Systems and Computing. 2020; ():11-20.
Chicago/Turabian StyleMaria Akrioti; Socrates Basbas; Georgios Georgiadis; Eftihia Nathanail. 2020. "Investigation of Minibus Public Transport Service Characteristics in an Urban Area Through the Use of a Stated and Revealed Preference Survey." Advances in Intelligent Systems and Computing , no. : 11-20.
People living in peri-urban low-density areas may not choose the urban rail because they are hindered by the ‘first/last mile’ problem. The issue concerns poor bus feeder service to rail stations and/or congested Park&Ride facilities at respective intermodal hubs. Shared mobility in the form of car- pooling is a viable alternative in connection to urban rail, especially when appropriate incentives and ridematching tools are effectuated. A multi-modal ride-matching app combining flexible (carpooling) and scheduled (rail and bus public transport) mobility is stipulated by the Horizon 2020 Ride2Rail project. Two intermodal hubs of urban rail along the 20 km-long corridor connecting the Athens basin with the Athens airport in Eastern Attica, Greece, are selected as a case study. The paper envisages the behavioural underpinning of combined rail- rideshare travel companion platform in the first/last mile context through the design of a SP experiment, as mode choice is concerned. All main access and egress modes of intermodal hubs are considered in the mode choice experiment, namely driving alone, using bus feeder, carpool driving and carpool riding. Tested parameters pertain particularly to incentive mechanisms increasing ridesharing to intermodal hubs, contextual preferences related to the trip purpose and perceived barriers of shared mobility.
Alexandros Deloukas; Georgios Georgiadis; Panagiotis Papaioannou. Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens. 2020, 1 .
AMA StyleAlexandros Deloukas, Georgios Georgiadis, Panagiotis Papaioannou. Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens. . 2020; ():1.
Chicago/Turabian StyleAlexandros Deloukas; Georgios Georgiadis; Panagiotis Papaioannou. 2020. "Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens." , no. : 1.
People living in peri-urban low-density areas may not choose the urban rail because they are hindered by the ‘first/last mile’ problem. The issue concerns poor bus feeder service to rail stations and/or congested Park&Ride facilities at respective intermodal hubs. Shared mobility in the form of carpooling is a viable alternative in connection to urban rail, especially when appropriate incentives and ridematching tools are effectuated. A multi-modal ride-matching app combining flexible (carpooling) and scheduled (rail and bus public transport) mobility is stipulated by the Horizon 2020 Ride2Rail project. Two intermodal hubs of urban rail along the 20 km-long corridor connecting the Athens basin with the Athens airport in Eastern Attica, Greece, are selected as a case study. The paper envisages the behavioural underpinning of combined rail-rideshare travel companion platform in the first/last mile context through the design of a SP experiment, as mode choice is concerned. All main access and egress modes of intermodal hubs are considered in the mode choice experiment, namely driving alone, using bus feeder, carpool driving and carpool riding. Tested parameters pertain particularly to incentive mechanisms increasing ridesharing to intermodal hubs, contextual preferences related to the trip purpose and perceived barriers of shared mobility.
Alexandros Deloukas; Georgios Georgiadis; Panagiotis Papaioannou. Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 12250, 819 -835.
AMA StyleAlexandros Deloukas, Georgios Georgiadis, Panagiotis Papaioannou. Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; 12250 ():819-835.
Chicago/Turabian StyleAlexandros Deloukas; Georgios Georgiadis; Panagiotis Papaioannou. 2020. "Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens." Transactions on Petri Nets and Other Models of Concurrency XV 12250, no. : 819-835.
People living in peri-urban low-density areas may not choose the urban rail because they are hindered by the ‘first/last mile’ problem. The issue concerns poor bus feeder service to rail stations and/or congested Park&Ride facilities at respective intermodal hubs. Shared mobility in the form of car- pooling is a viable alternative in connection to urban rail, especially when appropriate incentives and ridematching tools are effectuated. A multi-modal ride-matching app combining flexible (carpooling) and scheduled (rail and bus public transport) mobility is stipulated by the Horizon 2020 Ride2Rail project. Two intermodal hubs of urban rail along the 20 km-long corridor connecting the Athens basin with the Athens airport in Eastern Attica, Greece, are selected as a case study. The paper envisages the behavioural underpinning of combined rail- rideshare travel companion platform in the first/last mile context through the design of a SP experiment, as mode choice is concerned. All main access and egress modes of intermodal hubs are considered in the mode choice experiment, namely driving alone, using bus feeder, carpool driving and carpool riding. Tested parameters pertain particularly to incentive mechanisms increasing ridesharing to intermodal hubs, contextual preferences related to the trip purpose and perceived barriers of shared mobility.
Alexandros Deloukas; Georgios Georgiadis; Panagiotis Papaioannou. Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens. 2020, 1 .
AMA StyleAlexandros Deloukas, Georgios Georgiadis, Panagiotis Papaioannou. Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens. . 2020; ():1.
Chicago/Turabian StyleAlexandros Deloukas; Georgios Georgiadis; Panagiotis Papaioannou. 2020. "Shared Mobility and Last-Mile Connectivity to Metro Public Transport: Survey Design Aspects for Determining Willingness for Intermodal Ridesharing in Athens." , no. : 1.
Competitive Tendering is perhaps the preferred approach for procuring Public Transport (PT) passenger services in the EU, according to its legislation. Cyprus has initiated a few years ago the second PT reform cycle which will be concluded with the awarding of six new concession contracts for passenger services by bus. This paper presents and discusses the two PT reforms in Cyprus. The aim of the second reform is to significantly increase the PT share by improving service availability and quality through the transition from a monopolistic to a more competitive PT market. According to the roadmap prepared by the Cypriot authorities, specific contracting arrangements have been set to attract both local and international PT operators to the competitive tendering process. These arrangements mostly pertain to the eligibility and selection criteria of the tendering process, the opportunity to lease PT buses from local companies and the contract type and duration. The paper sets five main questions addressing critical issues of the reform effort and provides responses through the in-depth analysis of the selected tender and contractual arrangements. Useful findings and conclusions may be drawn, especially regarding the effect of small size market and the lack of necessary PT infrastructure.
Panagiotis Papaioannou; Georgios Georgiadis; Anastasia Nikolaidou; Ioannis Politis. Public Transport tendering and contracting arrangements in countries under regulatory transition: The case of Cyprus. Research in Transportation Economics 2020, 83, 100944 .
AMA StylePanagiotis Papaioannou, Georgios Georgiadis, Anastasia Nikolaidou, Ioannis Politis. Public Transport tendering and contracting arrangements in countries under regulatory transition: The case of Cyprus. Research in Transportation Economics. 2020; 83 ():100944.
Chicago/Turabian StylePanagiotis Papaioannou; Georgios Georgiadis; Anastasia Nikolaidou; Ioannis Politis. 2020. "Public Transport tendering and contracting arrangements in countries under regulatory transition: The case of Cyprus." Research in Transportation Economics 83, no. : 100944.
Road tolling plays a significant role on highways’ financial sustainability since it consists the major revenue source. This paper aims to examine the factors that affect the drivers’ route choice and urge them to avoid toll roads when an alternative toll-free route is available. The paper presents the results of a case study that is dealing with the issue of toll avoidance at the last non-privatized highway of Greece, the Egnatia Odos (EO) road. Data from a combined revealed and stated preference survey were collected and binary choice models were built for car and truck drivers so as to determine the utility of alternative routes. The results show that travel cost and toll fees are critical route choice criteria for car drivers, while travel time is a key decision factor for truck drivers. The high safety standards for the toll route were appreciated by both categories of drivers. Additional trip and personal characteristics, such as gender, trip frequency, type of transported cargo, and total trip length also affect drivers’ choices. The elasticity of travel time and cost was estimated to shed light on drivers’ sensitiveness to the route attributes and it was found that truck drivers’ choices are greatly influenced by their working time schedules. These findings highlight the key factors that influence the utility of toll roads and therefore could assist highway authorities and concessionaires in developing successful toll pricing policies which will not act as a deterrent to the use of highways.
Ioannis Politis; Michalis Kyriakoglou; Georgios Georgiadis; Panagiotis Papaioannou. Evidence from Highway Drivers in Greece Showing Toll Avoidance and Utility of Alternative Routes. Transportation Research Record: Journal of the Transportation Research Board 2020, 2674, 948 -958.
AMA StyleIoannis Politis, Michalis Kyriakoglou, Georgios Georgiadis, Panagiotis Papaioannou. Evidence from Highway Drivers in Greece Showing Toll Avoidance and Utility of Alternative Routes. Transportation Research Record: Journal of the Transportation Research Board. 2020; 2674 (9):948-958.
Chicago/Turabian StyleIoannis Politis; Michalis Kyriakoglou; Georgios Georgiadis; Panagiotis Papaioannou. 2020. "Evidence from Highway Drivers in Greece Showing Toll Avoidance and Utility of Alternative Routes." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 9: 948-958.
Public transport systems’ effectiveness is a well-recognized pillar of their sustainability. In this study, we employed order-m efficiency estimators to investigate the effectiveness of 57 bus public transport operators that provide services in both large and medium sized European cities. Their effectiveness was simulated through a tailored production model and was evaluated against critical exogenous variables, which were mostly extracted from Eurostat database. Results showed that the effectiveness of the examined operators is generally satisfactory. Our research suggests that certain exogenous factors significantly affect operators’ effectiveness and thus create either advantageous or disadvantageous operational environments for maintaining public transport sustainability. Among these factors, household size, unemployment and car ownership rates were found to be unfavorable to bus public transport operations. Contrary to them, the presence of university students and metro systems in cities create a favorable operational environment for bus public transport effectiveness. These findings assist in the identification of sustainable development policies that would both contribute to public transport sustainability and to the fulfillment of wider community goals. Our findings also rationalize benchmarking exercises in the public transport industry, since they enable fair performance comparisons between systems that seek to incorporate successful management practices to improve their sustainability.
Georgios Georgiadis; Ioannis Politis; Panagiotis Papaioannou. How Does Operational Environment Influence Public Transport Effectiveness? Evidence from European Urban Bus Operators. Sustainability 2020, 12, 1 .
AMA StyleGeorgios Georgiadis, Ioannis Politis, Panagiotis Papaioannou. How Does Operational Environment Influence Public Transport Effectiveness? Evidence from European Urban Bus Operators. Sustainability. 2020; 12 (12):1.
Chicago/Turabian StyleGeorgios Georgiadis; Ioannis Politis; Panagiotis Papaioannou. 2020. "How Does Operational Environment Influence Public Transport Effectiveness? Evidence from European Urban Bus Operators." Sustainability 12, no. 12: 1.
In this paper we analyse the performance of 34 multimodal public transport networks worldwide to investigate whether the service characteristics of their metro components significantly affect bus performance and vice versa as well as whether their operational environment exerts the same impact on metro and bus public transport modes. We built a combined effectiveness model to simulate the production process of both bus and metro systems and calculated credible performance scores for them by applying data envelopment analysis and bootstrapping techniques. Results showed that, on average, both bus and metro systems require a great ridership increase to reach their best performing peers. We employed conditional robust order-m efficiency estimators to identify factors that may account for these performance rankings. Empirical findings indicate that bus and metro systems more coexist than cooperate in terms of developing their performance profiles. Bus and metro systems are influenced by different exogenous factors and fail to incorporate effectiveness improvements if service upgrades are delivered in their road or rail public transport counterparts. Our findings provide for a better understanding of the interrelationships within multimodal public transport networks and thus contribute to the formulation of both appropriate decision making and realistic performance targets.
Georgios Georgiadis; Panagiotis Papaioannou; Ioannis Politis. Rail and road public transport: Cooperation or coexistence? Transportation Research Interdisciplinary Perspectives 2020, 5, 100122 .
AMA StyleGeorgios Georgiadis, Panagiotis Papaioannou, Ioannis Politis. Rail and road public transport: Cooperation or coexistence? Transportation Research Interdisciplinary Perspectives. 2020; 5 ():100122.
Chicago/Turabian StyleGeorgios Georgiadis; Panagiotis Papaioannou; Ioannis Politis. 2020. "Rail and road public transport: Cooperation or coexistence?" Transportation Research Interdisciplinary Perspectives 5, no. : 100122.
The spatial arrangement of public transport systems seriously affects their ridership and thus the fulfillment of sustainable transport goals. This paper examines the case of students at Aristotle University of Thessaloniki and investigates their perceptions regarding a critical spatial attribute of public transport, that is, the walking distance they have to cover to/from bus stops when they commute by bus to their campus. A questionnaire survey was conducted to collect relevant data from 300 students and a set of statistical inference methods was employed to explore whether student-specific attributes relate to the walking distances they consider to be acceptable. Empirical findings highlighted weak relationships between user/trip specific attributes with regard to students, and their walking distance preferences for the bus public transport services they use. The majority of students consider that the maximum acceptable walking distance can be higher than the standard value of 400 meters. Moreover, they would be willing to walk more than they currently do in order to reach a bus stop with higher service frequencies to their campus. The study concept and findings could assist in delivering a more successful spatial design of bus public transport systems which serve university campuses. A more sparsely positioned network of bus stops would provide better opportunities for personal physical activity but should not yield increased total travel times; and they should incorporate local user expectations. Public transport agencies could also benefit from achieving higher service speeds which, in turn, would reduce energy consumption and operating costs.
Christos Tsioulianos; Socrates Basbas; Georgios Georgiadis. How do passenger and trip attributes affect walking distances to bus public transport stops? Evidence from university students in Greece. Spatium 2020, 12 -21.
AMA StyleChristos Tsioulianos, Socrates Basbas, Georgios Georgiadis. How do passenger and trip attributes affect walking distances to bus public transport stops? Evidence from university students in Greece. Spatium. 2020; (44):12-21.
Chicago/Turabian StyleChristos Tsioulianos; Socrates Basbas; Georgios Georgiadis. 2020. "How do passenger and trip attributes affect walking distances to bus public transport stops? Evidence from university students in Greece." Spatium , no. 44: 12-21.
Georgios Georgiadis; Ioannis Politis; Panagiotis Papaioannou. Measuring and improving the efficiency and effectiveness of bus public transport systems. Research in Transportation Economics 2014, 48, 84 -91.
AMA StyleGeorgios Georgiadis, Ioannis Politis, Panagiotis Papaioannou. Measuring and improving the efficiency and effectiveness of bus public transport systems. Research in Transportation Economics. 2014; 48 ():84-91.
Chicago/Turabian StyleGeorgios Georgiadis; Ioannis Politis; Panagiotis Papaioannou. 2014. "Measuring and improving the efficiency and effectiveness of bus public transport systems." Research in Transportation Economics 48, no. : 84-91.
Georgios Georgiadis. The Role of Benchmarking in Public Transport: The Case of Thessaloniki, Greece. Procedia - Social and Behavioral Sciences 2012, 48, 2577 -2587.
AMA StyleGeorgios Georgiadis. The Role of Benchmarking in Public Transport: The Case of Thessaloniki, Greece. Procedia - Social and Behavioral Sciences. 2012; 48 ():2577-2587.
Chicago/Turabian StyleGeorgios Georgiadis. 2012. "The Role of Benchmarking in Public Transport: The Case of Thessaloniki, Greece." Procedia - Social and Behavioral Sciences 48, no. : 2577-2587.